Paint removing device



March 10, 41936. R A COFFELT 2,033,327

. PAINT REMOVING DEVICE Filed Nov. '7, 1955 2 Sheets-Sheet 1 FIG. I 28 FIG. 1

ROBERT A. COFFELT /N VEN T02 March 10, 1936. R A COFFELT 2,033,327

PAIN'I1 REMOVING DEVICE Filed NOV. '7, 1935V 2 Sheets-Sheet 2 i Tre.. 4 I' /3 FIC-:1.3. A'

- 7' TORNEY.-

Patented Mar. l0, 1936 UNITED STATI-:s

PATENT OFFICE 1 Claim.

This invention relates to improvements in devices for removing paint, varnish and the like from painted surfaces.

The principal object of the invention is to provide a device of this character in the form of a hand tool to which electricity is applied for the purpose of heating the paint removing tool itself, whereby` the paint being dealt with is first softened by the heat and then easily removed by the tool itself.

Another object of the invention is to provide a device of this character wherein a plurality of scraping tools are provided and wherein each of said scraping tools may be heated as the work progresses. In other words, one scraping blade is iirst heated and then moved to its operative position. When so moved the following tools,

which are in inoperative positions, are being heated in preparation for their movement into an operative position to be applied to the painted surface.

Still another object of the invention is the provision of a device of this character which is of simple, eilicient, durable and inexpensive construction wherein the several parts are readily accessible.

These and other objects will appear as my invention is more fully hereinafter described in the following specification, illustrated in the accompanying drawings, and nally pointed out in the appended claim.

In the drawings:

Figure 1 is a front elevation of my new and improved tool with parts in section for convenience of illustration.

Figure 2 is an end elevation of Figure 1 looking in the direction oi' the arrow in Figure 1.

Figure 3 is an end elevation of a slotted head in which the scraping blades and heating element are mounted.

Figure 4 is a longitudinal, sectional elevation of Figure 3, taken along the line 4-4 in Figure 3.

Figure 5 is an edgewise view of Figure 3 looking in the direction of the arrow in Figure 3. In this view a section of Figure 3 is also shown, as viewed along the line 5 5 in- Figure 3.

Figure 6 is a greatly enlarged edgewise view of one of the scraping blades showing its desired angular relation with the work being dealt with.

Referring now more particularly to the drawings:

The main body of my invention consists of an elongated and squared head l, slotted through- (cl. 21e-29) out its length at each of its corners as indicated at 2. Within each of these slots I securely mount a. scraping blade 3, which extends full length of the head and projects above the corners thereof as shown. Each end of each scraping -5 blade is cut inwardly as at 4 and provided with a tapered projection, 5. At the end' of each slot and at the bottom thereof, as best shown in Figure 5. I form an inwardy extending and internally threaded aperture 6 which is adapted 10 to receive an externally threaded hollow tube 1. 'I'he innermost hollow end of the tube I is adapted to embrace the tapered projection 5 s o that as the tube is advanced within the threaded aperture 6, the scraping blade 3 will be securely 15 held within its respective slot.

The head I is internally bored throughout its length as at 8 to receive any approved form o! electrical heating element 9 which is mounted upon a cylindrical core I0. Each end of the 20 core is formed with threaded projections II and over each of these projections I place retaining discs I2 and I3 which are adapted to retain the core of the heating element within the head. Annular recesses I4 are formed ateach end of 25 the head to receive the said discs and to maintain them ush with the ends of the head, as shown in Figure 4. The disc I3 is provided with collector rings I5 and I6 which form electric terminals for said heating element From the 30 foregoing it will be readily understood that when electric energy is applied to the heating element and causes the same to heat, the head and scraping blades 3 carried by it will become heated to a high degree. The discs I2 and I3 35 form bearings for the head so that the same may be rotated during operation of 'the tool.

For convenience of handling the tool I provide a pair of arms Il and I8 spread apart to embrace the head as best shown in Figure 1. 40 Each outermost end of the arms I1 and I8 is bifurcated as at I8 to embrace a square nut 28 which is mounted upon each of the threaded projections Il. Each nut serves the purpose oi retaining the discs I2 and I3 in place within the 45 annular recesses. The bifurcated ends of said arms, said nuts and said threaded extensions II, are secured in iixed relation to each other by any suitable means, such for instance, as the tapered pin 2l. Extending through the arm I8 50 and in spaced relation with respect to each other are a pair of electrical terminals 22 and 23 whose innermost ends contact said collector rings I5 and I6. These terminals are embraced within an electrical circuit 24 which extends to 55 any convenient source oi energy through the conventional form of plug 215 or through any other approved means of connecting said circuit 24 with a source of electrical energy.

The uppermost ends of the arms I1 and I8 are joined together as at 26 and longitudinally bored as at 21. These ends are securely mounted within the lowermost end of any approved form of handle 28 which is longitudinally bored throughout its length as at 29.

The electrical circuit 24 is secured to the outside of the handle for a portion of its length by means of a clamping band 30, and for the remainder of the length of the handle the circuit may extend through the longitudinal bore 29 for maintaining the circuit out of the way of the operator.

Extending through the lower bored portion of the handle is a push rod 3| which is formed at its uppermost end with any suitable form of push button 32. The handle in the vicinity of the push button is slotted out through the side Wall of the handle and the slot is in open communication with the bore 29. The upper end of the push rod 3| is turned outwardly through the slot and formed with the push button as aforesaid, thus it may be seen that the rod may be operated in an up and down movement by minipulation of the push button, Pivotally connected to the lowermost end of the push rod 3|, as indicated at 33, are a pair of links 34, interconnected by a tension spring to normally maintain the links in a position of repose as shown in Figure l. Pivotally connected to the lowermost end of each link 34 are a pair of outwardly extending and aligned arms 36, which extend outwardly through apertures 31, formed in the arms I1 and I8, thence outwardly and inwardly through apertures 38 formed throughfthe lower ends of arms I1 and I8. The arms 36 are slidably mounted through any suitable form of brackets 39 which are mounted to a support 40 which is secured to the underside of the arms I1 and I8 as shown. The inwardly turned ends of the arms 36 are adapted to normally engage within the hollow externally threaded tubes 1 or they may be made to engage in any other suitable apertures formed aosaaar in the ends of the head for the purpose of maintaining the head in any of its adjusted positions while presenting any one of the scraping blades to the work to be dealt with, and to maintain said blade in xed relation with respect to the handle.

When it is desired to change blades or in other words, rotate the head to bring a freshly heated blade into an operative position it is merely necessary for the operator to apply downward pressure on the push button 32 which will cause the arms 36 to spread or move outwardly with a resultant disengaging of the inwardly turned ends of the arms from said tubes 1, or other suitable apertures as aforesaid. Thus, upon disengaging the inwardly turned ends of said arms, the head is free to be rotated in either direction.

In Figure 6 I have shown a greatly enlarged edgewise view of one of the scraping blades, for the purpose of illustrating the desired angular relation of the converging surfaces of the scraping edge of the tool. This particular angular relation is particularly desirable in a tool of this character, so that when the tool is presented to the work to be dealt with in substantially the same angle as shown in Figure 6, the trailing surface of the scraping edge will be elevated from the work, and also so that the leading surface of the cutting edge will be inclined slightly rearwardly to prevent the paint being removed from rolling up ahead of the cutting edge and possibly rolling under the cutting edge.

While I have shown a particular form of embodiment of my invention I am aware that many mere minor changes therein will readily suggest themselves to others skilled in the art without departing from the spirit and scope of the invention, having thus described the inven' tion what I claim as new and desire to protect by Letters Patent is:

A scraping tool comprising a rectangular block of metal completely embracing an electric heating element, said block having a scraping plate removably secured thereto, a handle rotatably mounted to said block.

ROBERT A. COFFELT. 

